Malicious PDF — malware analysis report

Static analysis result for SHA-256 269af947244d3565…

MALICIOUS

PDF

78.9 KB Created: 2021-04-05 07:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1b41d236d8479ab1030c04d2680c213a SHA-1: 541c57915954f2dce9bc9184f30da6865138a1d0 SHA-256: 269af947244d3565b37fe8b5bc0b0053733cc06a0246a47154c44a81e8bf2017
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified as a link farm, with a primary URL pointing to a "wsop poker chips hack" lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO abuse. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/wix?keyword=wsop+poker+chips+hack PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389107/normal_5fce42f238ffd.pdfIn PDF document text
    • https://sovirolozemeze.weebly.com/uploads/1/3/4/3/134337586/menotad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5fc985ffce4f3.pdfIn PDF document text
    • https://xowebanum.weebly.com/uploads/1/3/1/4/131453595/3d25146.pdfIn PDF document text
    • http://homearfes.com/tipos_de_sistemas_de_informacion_en_las_empresasxi0vw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_5fd2b0616c7fd.pdfIn PDF document text
    • https://sonoredepi.weebly.com/uploads/1/3/0/9/130969061/nisamemogagarulojo.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/6c9ZFid/sales_forecasting_salesforce_reporting.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/bb6f54336cf.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/5MjbSFL/58721836687.pdfIn PDF document text
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/d3903efb7d899.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/92jijcW/espier_launcher_ios_10_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxovunevo/mmqwLhi/vavinikalugap.pdfIn PDF document text
    • http://maddot.space/88710826734v91w4.pdfIn PDF document text
    • https://cdn.sqhk.co/farukisinu/nFLiehe/1921911973.pdfIn PDF document text
    • https://cdn.sqhk.co/sikereri/ARjdCkw/hmrc_self_assessment_tax_return_form_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_606a65292dc1f.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/hcgijie/rc_helicopter_ar_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/sdiihek/download_new_notification_sounds_android.pdfIn PDF document text
    • http://bnl-jobs.com/8593281422960ic7.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/fiwugi.pdfIn PDF document text
    • https://cdn.sqhk.co/ketadasogob/jhhhije/visewibuvafijelamipirofaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 4668 bytes
SHA-256: 5c99f8d17457103b203cc3b2ad181dead91226c96a3c88e4278665ef1e5c8e5f
font_01_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 11100 bytes
SHA-256: 9e57326882d5e3cebba174812ae17d91e657ead325fe3d0f8313842611f4e7d5
font_02_sfnt_off00011fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c